/**
     * Fetches a URI and parses it for Open Graph data, returns
     * false on error.
     *
     * @param $URI    URI to page to parse for Open Graph data
     * @return OpenGraph
     */
    static public function fetch($URI) {


        try {
            $curl = curl_init($URI);
            if ($curl === false) {
                throw new Exception('failed to initialize');
            }


            curl_setopt($curl, CURLOPT_FAILONERROR, true);
            curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
            curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
            curl_setopt($curl, CURLOPT_TIMEOUT, 15);
            curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
            curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, true);
            curl_setopt($curl, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);

            $response = curl_exec($curl);
            if ($response === false) {
                throw new Exception(curl_error($curl), curl_errno($curl));
            }

            curl_close($curl);

            if (!empty($response)) {
                return self::_parse($response);
            } else {
                return false;
            }
        } catch (Exception $e) {

            trigger_error(sprintf(
                'Curl failed with error #%d: %s',
                $e->getCode(), $e->getMessage()),
                E_USER_ERROR);
        }
    }